Valves and Actuators

Who Should Attend

This course explains features and characteristics of control valves and actuators in the aim of proper understanding. This training emphasizes the important aspects of valves and actuators and lead to a greater understanding of flow aspects pertinent to these devices. In some cases, the differences between certain valves and actuators can be quite large, whilst in others, the variations are very subtle.
Delegates are taught to focus and differentiate between the various devices that are available, and how they fit into the greater scheme of things. This exposure, most certainly, will promote greater confidence in the ability of delegates to make informed decisions, as well as to assist in decisions that are made at a higher level.

·   Comprehend the inner operation of most commonly utilized valve types
·   Decide on the best valve to use, for specific applications
·   Determine the most cost effective valve size
·   Determine the best device to drive and operate an assortment of valves
·   Get control valves to operate optimally in the field, using an assortment of techniques

·   Valve Principals, Purposes, Types, Control Signals and Flow Conditions
·   Valve principles, valve purposes, and control signals used with valves
·   Flow conditions in and around valves
·   Reynolds numbers
·   Cavitation and flashing, and how this influences valve selection
·   Associated equipment, pertinent to valves
·   Definitions, and principles of operation of the major types of valves
·   Valve in P&IDs, Leakage, Valve Characteristics and Valve Size Calculations
·   Continuation of the definitions, and principles of operation of more major types of valves
·   Additional associated equipment, pertinent with valves
·   P&ID diagrams associated with valves
·   Valve leakage, and valve leakage rate calculation
·   Valve inherent characteristics, and their importance once installed
·   Performing manual calculations, for valve sizing
·   Valve Software, Actuators, Positioners, Cavitation & Noise Control & SIS
·   Software used to size control valves
·   Assorted actuators, and their properties and characteristics
·   Valve positioners
·   Cavitation and noise control, in and around valves
·   Valves, and how they fit into pressure relief and Safety Instrumented Systems (SIS)
·   Using digital controllers, with valves
·   3-term Controllers and Loop-tuning for Processes containing Control Valves
·   Understanding and implementing the right controller action, for fail-safe valves
·   Understanding all of the variables, associated with three-term control
·   Open loop tuning, for controllers that act on control valve loops
·   Closed loop tuning, for controllers that act on control valve loops
·   Trial and error tuning, to optimize control valve performance
·   Using Valves in Cascade, Ratio, Dead-Time Dominant, Non-Linear and PLC-Controlled Processes
·   Setting up a cascade loop, using a single valve and multiple controllers
·   Setting up a ratio loop, using a single valve and multiple process variables (PVs)
·   Dead time dominant loops, how this affects the valve performance, and how this is corrected
·   Using a control valve in a process that exhibits different responses in different zones
·   Combining PLCs, for valve control

Key instrumentation personnel involved in valve maintenance, Senior management and staff responsible for valve and actuator selection, Mechanical and electrical staff that come into contact with valves
Process control engineers requiring a high plant availability, often affected by valves.

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Enrolled: 0 students
Duration: 5 Days
Level: All Level

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